Evaluating Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their given values.

Front

Evaluate b² + 4 when b = 3.

Back

13

Front

Evaluate 3d when d = 5.

Back

15

Front

Evaluate y + 17 when y = 11.

Back

28

Front

Evaluate 2(a - 5) + 2 when a = 15.

Back

22

Front

Evaluate 2x + x - 10 when x = 8.

Back

14

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often abbreviated as PEMDAS.

Front

What is a variable in an expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value in an expression or equation.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change.